TTF Limo-GT, Service Work Instructions

Page: 34 / 35

The lithium battery is a closed system.
The battery pack should not be opened. If
any issues appear the BMS readout
should identify what the issue is.
The BMS shows specific errors.
Depending on the risk the errors are there
are three fault levels:
1. Severe error, battery shuts down.
Vehicle will lose all driving power.
Warning is shown briefly before
vehicle (and BDI) shuts down.
2. Risky error, vehicle will limit top
speed and battery current. Warning
is shown on BDI.
3. Warning error, Warning is shown on
BDI.
All errors can be found in the Error
Handbook.
Lithium battery: Troubleshooting
Common lithium battery errors:
●
Controller shows CANbus error
(controller error 58&59): Canbus
communication issue, the controller
cannot read the BMS signals. All
CANbus cables and the CANbus
optoadapter need to be checked.
●
Isolation error (Berr 7&30): Check Slide
32 .
●
Cell balance
Range issues:
● Battery capacity can be misread by
BMS. This will lead to low vehicle
range. In GTDS you can read current
>2A when there is no load (Controller
and DCDC disconnected from battery).
Battery calibration is required (expert
level only)
34
Isolation error shows as fault code 7 and
fault level 1 in GTDS monitor
Isolation error shows as bErr 7 on BDI
Current should be <2A with no load